CN202160164U - Microwave cavity bubble device - Google Patents
Microwave cavity bubble device Download PDFInfo
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- CN202160164U CN202160164U CN2011202299664U CN201120229966U CN202160164U CN 202160164 U CN202160164 U CN 202160164U CN 2011202299664 U CN2011202299664 U CN 2011202299664U CN 201120229966 U CN201120229966 U CN 201120229966U CN 202160164 U CN202160164 U CN 202160164U
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- microwave cavity
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Abstract
The utility model discloses a microwave cavity bubble device, which belongs to the field of atomic frequency standard and comprises an integrated light-filtering absorption bubble, a microwave cavity, a photoelectric cell, a temperature control component, a magnetic induction coil, a magnetic screen and a printed board. The integrated light-filtering absorption bubble is located in the microwave cavity, the magnetic screen is arranged outside the microwave cavity, and the temperature control component is installed on the microwave cavity. The microwave cavity comprises a cavity cover, a cavity body and a coupling ring. A light-transmitting grating is arranged in the middle of the cavity cover, the coupling ring is fixed on the cavity cover and located on the central axis of the cavity cover, and the photoelectric cell and the printed board are installed on the cavity cover. The magnetic induction coil is arranged on the periphery of the cavity body, a supporting component is arranged between the integrated light-filtering absorption bubble and the bottom of the cavity body in clamped mode, and the expansion coefficient of the supporting component is larger than that of the microwave cavity. The supporting component is arranged between the bottom of the microwave cavity and the integrated light-filtering absorption bubble, the expansion coefficient of the supporting component is larger than that of the microwave cavity, and influence of temperature variation on resonant frequency of the microwave cavity can be reduced, thereby improving stability of the output frequency of the rubidium atomic frequency standard.
Description
Technical field
The utility model relates to the atomic frequency standard field, particularly a kind of microwave cavity bulb apparatus.
Background technology
Quantized system is the important component part of atomic frequency standard; Be used under the effect of microwave interrogation signals; Output has the light inspection signal of kam-frequency characteristic, is locked on the atom resonance frequency through the output of this light inspection signal with the quartz oscillation crystal, guarantees the stable output of atomic frequency standard.Typical quantized system generally is made up of spectroscopic lamp and microwave cavity bulb apparatus two parts.
Existing microwave cavity bulb apparatus generally includes the bubble that filters, absorbs bubble, microwave cavity, photocell, heated constant temperature parts, C field coil and magnetic cup.Its operation principle is following: under the effect of spectroscopic lamp exciting light, at first filtered and atomic resonance by the bubble that filters, absorption bubble; Photocell is surveyed the transmitted light after the bubble that filters, the effect of absorption bubble, output light inspection signal.Microwave field that atomic resonance is required and weak magnetostatic field are provided by microwave cavity and C field coil respectively.And the heated constant temperature parts are arranged on the microwave cavity, are mainly used in to the bubble that filters, absorb the operational environment that bubble provides temperature constant.
In the process that realizes the utility model, the inventor finds that there is following problem at least in prior art:
Because the temperature effect in chamber is very obvious, under the bigger situation of variation of ambient temperature, aforementioned heated constant temperature parts can not be kept the temperature constant of microwave cavity, and the size of microwave cavity is understood temperature influence and changed.And the resonance frequency of microwave cavity depends on factors such as the shape, size, mode of resonance of microwave cavity.When the change in size of microwave cavity, its resonance frequency will depart from the atomic transition spectral line frequency, thereby cause the instability of the output frequency of atomic frequency standard.
The utility model content
For under the situation of variation of ambient temperature, improve the stability of the output frequency of atomic frequency standard, the utility model embodiment provides a kind of microwave cavity bulb apparatus.Said technical scheme is following:
A kind of microwave cavity bulb apparatus; Comprise that integrated filtering absorbs bubble, microwave cavity, photocell, temperature control parts, magnetic induction loop, magnetic cup and printed board; Said integrated filtering absorbs bubble and is positioned at said microwave cavity; Said magnetic cup is arranged on outside the said microwave cavity, and said temperature control parts are installed on the said microwave cavity;
Said microwave cavity comprises chamber lid, cavity and coupling loop, and the middle part of said chamber lid is provided with logical grating; Said coupling loop is fixed on said chamber and covers and be positioned on the central axis that covers in said chamber; Said photocell and printed board are installed in said chamber and cover; It is peripheral that said magnetic induction loop is located at said cavity; Be folded with support component between the bottom of said integrated filtering absorption bubble and said cavity, the coefficient of expansion of said support component is greater than the coefficient of expansion of said microwave cavity.
Wherein, said temperature control parts comprise thermistor and heater strip, and said thermistor is installed in said chamber and covers, and the direction of routing of said thermistor is said cavity axis direction; The sidewall of said cavity is provided with groove, and said heater strip adopts the twisted-pair feeder form and is looped around in the said groove.
Preferably, the inwall of said integrated filtering absorption bubble scribbles paraffin layer.
Wherein, said magnetic cup comprises interior magnetic cup, outer magnetic cup and base, be respectively equipped with on the said base be used to place said in the draw-in groove of magnetic cup, outer magnetic cup and microwave cavity, said in magnetic cup said microwave cavity and said outside between the magnetic cup.
Further, be provided with first fixture between said chamber lid and the said interior magnetic cup, be provided with second fixture between said interior magnetic cup and the said outer magnetic cup.
Wherein, said magnetic induction loop comprises the double-layer coil that the magnetic induction coil tube is outer with being wound on said magnetic induction coil tube.
Preferably, said microwave cavity adopts the TE011 mould design of cylindrical cavity.
Wherein, said photocell comprises two photocells, and said two photocell symmetries are positioned over the both sides of said coupling loop.
Preferably, said support component, microwave cavity adopt alloy material to process respectively.
Further, said chamber covers and also is provided with tuning screw.
Further, said microwave cavity bulb apparatus also comprises the base plate that places between said integrated filtering absorption bubble and the said support component.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: between the bubble support component is set through filtering in the bottom of said microwave cavity and integrated resonance, the coefficient of expansion of said support component is greater than the coefficient of expansion of said microwave cavity; When ambient temperature raise, microwave cavity became greatly with size axial direction along its cross-sectional direction simultaneously, simultaneously; Support component also extends, and geometrical extension is greater than the geometrical extension of microwave cavity, thereby actual chamber height is shortened on the contrary; Becoming along the size of cross-sectional direction under the big situation, the constancy of volume that can keep microwave cavity, thus the resonance frequency of microwave cavity is remained unchanged; In like manner; When ambient temperature descended, the resonance frequency of microwave cavity also can remain unchanged, thereby improved the stability of the output frequency of atomic frequency standard.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of microwave cavity bulb apparatus of providing among the utility model embodiment;
Fig. 2 is the structural representation of the chamber lid of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 3 is the structural representation of the magnetic induction coil of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 4 is the structural representation of heater strip of the microwave cavity of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 5 is the electromagnetic field distribution schematic diagram of the microwave cavity of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 6 is the magnetic cup structural representation of a kind of microwave cavity bulb apparatus shown in Figure 1;
In the accompanying drawing, the component list of each label representative is following:
Integrated filtering absorbs bubble 1, microwave cavity 2, photocell 3a, 3b, thermistor 4, heater strip 5, magnetic induction loop 6; Line outlet 7, printed board 8, chamber lid 9, cavity 10, tuning screw 11, coupling loop 12; Support component 13, base plate 14, base 15, magnetic induction coil tube 16, double-layer coil 17, hold-down screw 18; Interior magnetic cup 19, outer magnetic cup 20, the first fixture 21a, the second fixture 21b, logical grating 22, draw-in groove 23.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model execution mode is done to describe in detail further below.
As depicted in figs. 1 and 2; The utility model embodiment provides a kind of microwave cavity bulb apparatus; This microwave cavity bulb apparatus comprises that integrated filtering absorbs bubble 1, microwave cavity 2, photocell, temperature control parts, magnetic induction loop 6, magnetic cup and printed board 8; Said integrated filtering absorbs bubble 1 and is positioned at said microwave cavity 2, and said magnetic cup is arranged on outside the said microwave cavity 2, and said temperature control parts are installed on the said microwave cavity 2.Said microwave cavity 2 comprises chamber lid 9, cavity 10 and coupling loop 12, and the middle part of said chamber lid 9 is provided with logical grating 22; Said coupling loop 12 is fixed on the said chamber lid 9 and is positioned on the central axis of said chamber lid 9; Said photocell and printed board 8 are installed on the said chamber lid 9; Said magnetic induction loop 6 is located at said cavity 10 peripheries, is folded with support component 13 between the bottom of said integrated filtering absorption bubble 1 and said cavity 10, and the coefficient of expansion of said support component 13 is greater than the coefficient of expansion of said microwave cavity 2.
Wherein, said support component 13 is used to compensate the chamber that causes because of variations in temperature and changes frequently.Wherein, the 0-0 microwave resonance transition that is used to atomic hyperfine of said coupling loop 12 provides the magnetic coupling; Said magnetic induction loop 6 is used to integrated filtering and absorbs that atom provides energy level transition and quantization axle in the bubble 1; Said temperature control parts are used to integrated filtering and absorb the operational environment that bubble 1 provides constant temperature; Said photocell is used to detect the penetrating light intensity of microwave cavity 2, accomplishes simultaneously light signal is converted into the signal of telecommunication also through said printed board 8 outputs.
Particularly, the outer wall that the inwall of said cavity 10 and said integrated filtering absorb bubble 1 closely cooperates, and said integrated filtering absorption bubble 1 can slide in microwave cavity 2.Further, said integrated filtering absorbs bubble 1 and said microwave cavity 2 coaxial settings.
Particularly, said microwave cavity 2 can adopt the high metal of thermal conductivity to process, and said support component 13 can adopt alloy material to process.
Particularly, said coupling loop 12 1 ends are connected with the coaxial cable core wire that is fixed well, the other end is fixed on the central axis of said chamber lid 9 through hold-down screw (figure does not show), and place said integrated filtering to absorb bubble 1 top.Said coaxial cable core wire is used for being connected with external circuit, introduces microwave signal, and this knows for those skilled in the art, repeats no more at this.
Further, also be provided with tuning screw 11 on the said chamber lid 9, the axis direction of said tuning screw 11 is identical with the axis direction of said cavity 10.Because machining error, the actual resonance frequency of said microwave cavity 2 and result of calculation have certain difference, can come resonance frequency is finely tuned (the fine setting scope is probably within 100MHz) through changing the length of tuning screw 11 in the chamber.
Preferably, the inwall that said integrated filtering absorbs bubble 1 scribbles paraffin layer, is used to weaken atom relaxation effect.Said microwave cavity bulb apparatus also comprises the base plate 14 that places between said integrated filtering absorption bubble 1 and the said support component 13.The area of said base plate 14 is less than the sectional area of said cavity 10, thereby can move along the axis direction of said microwave cavity 2.Said base plate 14 also can adopt the alloy material manufacturing.
In the utility model embodiment, integrated filtering absorbs bubble 1 and adopts integrated design, and original optical filtering bubble and absorption bubble are integrated into a bubble, is beneficial to the miniaturization of microwave cavity bulb apparatus like this; Operation material in the bubble be natural rubidium (
87Rb with
85Rb respectively accounts for 27.8% and 72.2%); The first half of bubble mainly plays filter action, and latter half mainly plays the resonance effect; And, charge into buffer gas in order to reduce live width, to improve optical pumping efficient, can absorbing in the bubble 1 at integrated filtering.Know that easily the gas that integrated filtering absorbs in the bubble 1 also can be caesium etc.
Particularly, referring to Fig. 3, said magnetic induction loop 6 is made up of magnetic induction coil tube 16 and double-layer coil 17; Said magnetic induction coil tube 16 is set in outside the said cavity 10, and double-layer coil 17 is wound on outside the said magnetic induction coil tube 16.Double-layer coil 17 is the double lacquered wire circle, and is convenient unified from line outlet 7 outlets.
In conjunction with Fig. 1 and Fig. 4; The lateral wall of the cavity 10 of said microwave cavity is provided with groove, and said temperature control parts comprise thermistor 4 and heater strip 5, and said thermistor 4 is installed on the said chamber lid 9; Be used for the induced environment temperature; And the ambient temperature of sensing is sent to temperature-adjusting circuit in the printed board 8 or outside, and said heater strip 5 is looped around in the said groove, and temperature-adjusting circuit be that microwave cavity 2 heats according to the signal controlling heater strip 5 of thermistor 4.Further, the direction of routing of said thermistor 4 is said cavity 10 axis directions, and said heater strip 5 adopts the twisted-pair feeder form, thereby can eliminate the magnetic field longitudinal component that heating current produces, and has avoided the influence of the remanent magnetism of temperature control parts to the frequency marking index.
In the utility model embodiment, microwave cavity 2 adopts the TE011 mould design of cylindrical cavity, is used to
87The microwave transition of Rb atomic ground state fine structure provides suitable microwave field, and its resonance frequency is consistent with atomic transition frequency as the reference of quantum frequency discrimination.Obviously, microwave cavity 2 also can adopt designs such as TE111 mould.
As shown in Figure 5, the Distribution of Magnetic Field in the microwave cavity 2 is for vertically, and in axial direction parallel, and integrated filtering absorbs bubble 1 and is placed on chamber central authorities, can obtain stronger magnetic field excitation like this, makes things convenient for the hyperfine 0-0 transition of atom.In addition; Microwave electric field distributes parallel with the horizontal tangent plane of cylindrical cavity in the chamber; Even two of cylindrical cavity ports are owing to uncap and chamber not driving fit of tube that logical grating 22 causes like this, also can not cut off microwave electric field and cause electromagnetic consumable, instant microwave electric field and atomic interaction and stimulated radiation are fed back.
Particularly, referring to Fig. 2, said photocell comprises photocell 3a and photocell 3b, and said photocell 3a and photocell 3b symmetry are positioned over the both sides of said coupling loop 12.As can be seen from Figure 5; The intensity of the longitudinal component of microwave magnetic field is the strongest in the coupling loop both sides in the microwave cavity; So descend the strongest place of atomic resonance transition signal on the cavity both sides in working order,, can obtain signal to noise ratio preferably like this so photocell is installed in the both sides of central axis symmetrically.Further, said photocell is fixed in the printed board 8, and said printed board 8 is fixed on the chamber lid 9 through hold-down screw 18.Arrange electronic component and circuit in the said printed board 8, be used to receive the signal of telecommunication of photocell 3a, 3b, accomplished measuring ability; Also be used for and said heater strip 5 and said thermistor 4 formation loops, accomplish temperature control.
Particularly; Referring to Fig. 1 and Fig. 6; Said magnetic cup comprises interior magnetic cup 19, outer magnetic cup 20 and base 15, be respectively equipped with on the said base 15 be used to place said in the draw-in groove 23 of magnetic cup 19, outer magnetic cup 20 and microwave cavity 2, said in magnetic cup 19 said microwave cavity 2 and said outside between the magnetic cup 20.This structure can prevent external magnetic field (like earth magnetism) to atomic energy in the TE011 cylindrical cavity and the influence of division and " quantization axle ".
Further; Correspondence is provided with the first fixture 21a between said chamber lid 9 and the said interior magnetic cup 19; Thereby said microwave cavity 2 and said interior magnetic cup 19 are fixed together; Correspondence is provided with the second fixture 21b between said interior magnetic cup 19 and the said outer magnetic cup 20, thereby magnetic cup in said 19 and outer magnetic cup 20 are fixed together.Particularly, the said first fixture 21a, the second fixture 21b can be spring bayonet socket device.
The microwave cavity bulb apparatus of the utility model embodiment has the following advantages: the first, between the bottom of integrated filtering absorption bubble and cavity, support component is set, the coefficient of expansion of said support component is greater than the coefficient of expansion of said microwave cavity; When ambient temperature raise, microwave cavity became greatly with size axial direction along its cross-sectional direction simultaneously, simultaneously; Support component also extends, and the geometrical extension of support component is greater than the geometrical extension of microwave cavity, thereby actual chamber height is shortened on the contrary; Becoming along the size of cross-sectional direction under the big situation, the constancy of volume that can keep microwave cavity, thus the resonance frequency of microwave cavity is remained unchanged; In like manner; When ambient temperature descended, the resonance frequency of microwave cavity also can remain unchanged, thereby improved the stability of the output frequency of Rb atom frequency marking.The second, integrated filtering absorbs the integrated design of bubble employing, and original optical filtering bubble and absorption bubble are integrated into a bubble, is beneficial to the miniaturization of microwave cavity bulb apparatus; Three, microwave cavity adopts the TE011 mould design of cylindrical cavity; Quality factor Q value is high; And another advantage of TE011 mould is not have axial current, like this, even two ports of cylindrical cavity are owing to the chamber not driving fit of tube of uncapping and logical grating causes; Also can not cut off microwave electric field and cause electromagnetic consumable, instant microwave electric field and atomic interaction and stimulated radiation feedback; Four, heater strip adopts twisted pair design, and the direction of routing of thermistor is that cavity is axial, has eliminated the magnetic field longitudinal component that heating current produced basically, has avoided the deterioration of the remanent magnetism of temperature control parts to the atomic frequency standard index.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (10)
1. microwave cavity bulb apparatus; Comprise that integrated filtering absorbs bubble (1), microwave cavity (2), photocell, temperature control parts, magnetic induction loop (6), magnetic cup and printed board (8); Said integrated filtering absorbs bubble (1) and is positioned at said microwave cavity (2); Said magnetic cup is arranged on outside the said microwave cavity (2), and said temperature control parts are installed on the said microwave cavity (2); It is characterized in that,
Said microwave cavity (2) comprises chamber lid (9), cavity (10) and coupling loop (12), and the middle part of said chamber lid (9) is provided with logical grating (22); Said coupling loop (12) is fixed on the said chamber lid (9) and is positioned on the central axis of said chamber lid (9); Said photocell and printed board (8) are installed on the said chamber lid (9); Said magnetic induction loop (6) is located at said cavity (10) periphery; Said integrated filtering absorbs between the bottom of steeping (1) and said cavity (10) and is folded with support component (13), and the coefficient of expansion of said support component (13) is greater than the coefficient of expansion of said microwave cavity (2).
2. microwave cavity bulb apparatus as claimed in claim 1; It is characterized in that; Said temperature control parts comprise thermistor (4) and heater strip (5), and said thermistor (4) is installed on the said chamber lid (9), and the direction of routing of said thermistor (4) is said cavity (a 10) axis direction; The sidewall of said cavity (10) is provided with groove, and said heater strip (5) adopts the twisted-pair feeder form and is looped around in the said groove.
3. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, the inwall that said integrated filtering absorbs bubble (1) scribbles paraffin layer.
4. microwave cavity bulb apparatus as claimed in claim 1; It is characterized in that; Said magnetic cup comprises interior magnetic cup (19), outer magnetic cup (20) and base (15); Be respectively equipped with the draw-in groove (23) that is used to place said interior magnetic cup (19), outer magnetic cup (20) and microwave cavity (2) on the said base (15), said interior magnetic cup (19) is positioned between said microwave cavity (2) and the said outer magnetic cup (20).
5. microwave cavity bulb apparatus as claimed in claim 4 is characterized in that, is provided with first fixture (21a) between said chamber lid (9) and the said interior magnetic cup (19), is provided with second fixture (21b) between said interior magnetic cup (19) and the said outer magnetic cup (20).
6. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, said magnetic induction loop (6) comprises magnetic induction coil tube (16) and is wound on the outer double-layer coil (17) of said magnetic induction coil tube (16).
7. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, said microwave cavity (2) adopts the TE011 mould design of cylindrical cavity.
8. microwave cavity bulb apparatus as claimed in claim 7 is characterized in that, said photocell comprises photocell (3a) and photocell (3b), and said photocell (3a) and photocell (3b) symmetry are positioned over the both sides of said coupling loop (12).
9. like each described microwave cavity bulb apparatus of claim 1-8, it is characterized in that said chamber lid (9) is provided with tuning screw (11).
10. like each described microwave cavity bulb apparatus of claim 1-8, it is characterized in that, comprise that also being arranged at said integrated filtering absorbs the base plate (14) between bubble (1) and the said support component (13).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202299664U CN202160164U (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
| PCT/CN2011/076826 WO2013000176A1 (en) | 2011-06-30 | 2011-07-04 | Microwave cavity bubble device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202299664U CN202160164U (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202160164U true CN202160164U (en) | 2012-03-07 |
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ID=45767786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202299664U Expired - Lifetime CN202160164U (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
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| CN (1) | CN202160164U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299714A (en) * | 2011-06-30 | 2011-12-28 | 江汉大学 | Microwave cavity bubble device |
| CN102967366A (en) * | 2012-11-15 | 2013-03-13 | 江汉大学 | System used for improving microwave power frequency shift in atomic spectral line detection process |
| CN102980656A (en) * | 2012-11-15 | 2013-03-20 | 江汉大学 | Atomic spectral line detector based on microgravity environment |
| CN103034260A (en) * | 2012-11-30 | 2013-04-10 | 江汉大学 | Device for measuring temperature control factor of cavity bubble system and method for the same |
| CN103076746A (en) * | 2012-12-17 | 2013-05-01 | 江汉大学 | Wall shift measurement system and control method thereof |
| CN106920652A (en) * | 2017-02-22 | 2017-07-04 | 江汉大学 | A kind of magnetic-inductive device |
| CN110212918A (en) * | 2019-06-25 | 2019-09-06 | 中国科学院武汉物理与数学研究所 | A kind of outer layer temperature control and magnetic shielding device for Rb atom frequency marking |
-
2011
- 2011-06-30 CN CN2011202299664U patent/CN202160164U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299714A (en) * | 2011-06-30 | 2011-12-28 | 江汉大学 | Microwave cavity bubble device |
| CN102299714B (en) * | 2011-06-30 | 2013-05-08 | 江汉大学 | Microwave cavity bubble device |
| CN102967366A (en) * | 2012-11-15 | 2013-03-13 | 江汉大学 | System used for improving microwave power frequency shift in atomic spectral line detection process |
| CN102980656A (en) * | 2012-11-15 | 2013-03-20 | 江汉大学 | Atomic spectral line detector based on microgravity environment |
| CN102967366B (en) * | 2012-11-15 | 2016-07-06 | 江汉大学 | For improving the system of microwave power frenquency in atomic spectral line detection process |
| CN103034260A (en) * | 2012-11-30 | 2013-04-10 | 江汉大学 | Device for measuring temperature control factor of cavity bubble system and method for the same |
| CN103076746A (en) * | 2012-12-17 | 2013-05-01 | 江汉大学 | Wall shift measurement system and control method thereof |
| CN103076746B (en) * | 2012-12-17 | 2016-03-30 | 江汉大学 | A kind of control method of wall shift measurement system |
| CN106920652A (en) * | 2017-02-22 | 2017-07-04 | 江汉大学 | A kind of magnetic-inductive device |
| CN106920652B (en) * | 2017-02-22 | 2019-08-02 | 江汉大学 | A kind of magnetic-inductive device |
| CN110212918A (en) * | 2019-06-25 | 2019-09-06 | 中国科学院武汉物理与数学研究所 | A kind of outer layer temperature control and magnetic shielding device for Rb atom frequency marking |
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